Skein dyeing machine



6 Sheets-Sheet 1 G. E. DRUM ET AL SKEIN DYEING MACHINE Filed Aplfil 2l, 1951 May' l5, 1934.

Uil-L May 15, 1934- G. E. DRUM E-r Al.` 1,959,094

SKEIN DYEING MACHINE Filed April 21, 1931 6 Sheets-Sheet 2 'ATTOR' EY May l5, 1934. G. E. DRUM r-:r Ax.

SKEIN DYEING MACHINE Filed April 21, 1931 6 SheecS-SheeI 4 IN V EN T015 dal/leaner l e/j'/wm, 'ATTORNEV M M l May 15, 1934. G. E. DRUM Er AL 1,959,094

SKEIN DYEING MACHINE Fi1ed April 21, 1931 e sheets-sheet 5 May 15, 1934.

G. E. DRUM Er A1.

sKEIN DYEING MAcHNE Filed April 2l, 1931 6 Sheets-Sheet 6 ATTORNEYr Patented lMay 15, 1934 UNITED STATES y 1,959,994 sKEIN DYEING MACHINE George E. Drum and William H. Jaxheimer, Philadelphia, Pa., 'assignors to Smith, Drum & Company, Philadelphia, Pa., a corporation of Pennsylvania AApplication Aplri1'21, 1931, serial No. 531,682

11 Claims.

The present invention relates to machines for the dyeing liquid to the skeins of yarn at a pretreating yarn and more particularly to a mechanism for successfully and uniformly dyeing threads inthe form of hanks arranged in` sus- A pended position.

In the dyeing of yarn skeins, such for example as delicate lsilks and rayons, it has been found quite aproblem to do this uniformly and 'in such a manner as not to have some .resultant injurious effect upon the threads of .Rt-he material. As one step in successfully carrying out such dyeing operations an apparatus has been devised by theseapplicants associates wherein the yarn is suspended upon a xed support and then at certain intervals lifted and replaced upon the s upport during the dyeing operation and while these prior inventions have materially advanced the yarn dyeing art, other considerations have been found to enter into the problem which have led to still further original research and development. For .example it has been found that the lifting apparatus by which the yarn is shifted from one position to another upon its support creates sufficient frictional contact with the threads to damage them by wear and roughening so that the resultant dyed thread does not come up to standard strength and appearance. Also it has been found that the interval of rotation of the lifting mechanism has a very decided bearing upon the uniform appearance of the yarn when the'dyeing is complete and not only does this interval of lifting concern the propel` distribution of the dyeing liquor, but it has been found essential that its periodicity be' varied at different portions of the dyeing'operation. Furthermore it hasbeencustomary to supply heat to the treating liquid in the supply tank, but thereafter the circulation of the heated liquid results in lowering its temperature so that it does not always leave the discharge points in the proper condition.A

Some of theobjects of the present invention are to provide an improved complete unitary dyeing machine for skeins of yarn; to provide a dyeing machine wherein a new and better rersult in the dyeing effect is produced than ever heretofore; 'to provide aA means for lifting the yarn and moving it relative to its support at predetermined intervals and doing so without producing frictionalresistance tending to damage the delicate material; to provide a mechanism l for periodically changing the position of yarn -skeins upon a dyeing support and varying the periodicity of the lifting means during the dyeingoperation; to provide means for supplying applied to all like parts.

determined constant temperature; to provide a dyeing machine wherein the supply of liquid to a yarn support is in regulated quantities according to requirements; and to provide other improvements as will hereinafter appear.

In the accompanying drawings Fig. 1- represents-a side elevation of a skein dyeing machine embodying one form of the present invention; Fig. 2 represents a detail in elevation of one form of heating jacket construction; Fig. 3 represents'an end elevation of the machine; Fig. 4 represents a side elevation of one of the skein supports and associated parts; Fig. 5 represents a section on line 5`5 of Fig. 4; Fig. 6 represents a 70 section similar to Fig. 5 but showing a 'modified form skeinl support; Fig. 7 represents a section on line 7--7 of Fig. 4;V Fig. 8 represents a detail sec` tion on line 8- 8 of Fig. 1; Fig. 9 represents an enlarged detail of the speed control mechanism; Fig. 10- represents a sectional detail of the control box showing the parts therein; Fig. 11 represents a side elevation of a skein support embodying another form of the invention; Fig. 12 represents a section on line 12-12 of Fig. 11; and Fig.

13 represents a section of one form of three way so valve.

Referring tothe drawings one form of the ,/f

present invention in skein dyeing machines is shown and consists generally of a plurality of skein supports; a treating liquid circulating-and delivering mechanism; a strainer `or filtering unit; heating elements for maintaining the treating liquid at a satisfactory operating temperature when required; lifting elements for sporadically changing the position of the skeins relative to the skeinsupports; and a speed control for the liftin elements.

The skein supporting means consists in -the present instance, of a plurality of min-rotatable tubes 10 arranged in pairs which are supported at one end and communicate with separate headers l1 for each pair. As the supports and pair relations are all identical this description will be confined to one and like numerals of reference With these tubes 10 fixed at one end to headers ll in sucha manner as to extend horizontally the other end is free and unsupported, unless it is extra long and would tend to sag without support. The end of each tube is closed by a cap 12 which can be removedv when necessary to permit access to the interior of the ltube for cleaning purposes. At suitable intervals the upper face of the tube 10 and at opposite sides thereof, is provided with .aplurality *uo of perforations 13 which permit the free discharge of liquid from within the tube 10 to the outside.

thereof. While these tubes 10 have been referred to as skein supports they serve this function only indirectly in that end flanges 14 are fast to the tube 10 and carry between them the true skein support, which, in this instance, is formed in two sections 15 and 16, the outer face of which forms.

a substantially continuous cylinder of greater diameter than the diameter of the tube 10 and so eccentrically arranged with respect to the tube 10 that the section 16 is preferably in contact with the bottom of the tube 10i. The reason the cylinder is not a complete one is that the twoV sections are spaced apart at two positions near the top of the supporting element and at anangular distance from the verical axis so as to provide two longitudinally and substantially parallel slots 17 through which the treating liquid emerges against the supported skein. The section 15 is provided with inwardly turned, radially disposed side flanges 18 which seat upon-the tube 10 and thus serve as guide baffles directing the discharge liquid outwardly through the slots 17. The ends of the section 16 are correspondingly inwardly turned in a radial direction as flanges 20, butterminating in spaced relation to the tube 10 so that two .delivery slots 21 are provided for the liquid. It will thus be seen that the two sections 15 and 16 together provide a central support for the skein directly above the tube 10 and side supports which separate the two depending sides of the hanging skein. It will be noted also that the l section 16 as it diverges upwardly from the tube Ashaped to provide curved faces 23 which converge and respectively meetthe ends of the sections of the tubular vsupport parts 15 and 16 and this construction serves to maintain the end skeins properly suspended and somewhat spaced from the plane of the outer faces of these flanges. This 'contributes to an effect which will be hereinafter referred to.

For introducing treatingvliquid to the interior of the headers 11, a manifold 24 is connected for communication with all of the headers 11 and receives the treating liquid from a feed pipe 25 Vconnected to a distributor or control valve 26. 'I'his valve 26 is of the three way type having connection with a discharge pipe 27 and a return circulation pipe 28., An operating rod 29 from the movable element of the valve terminates in a handle 30 at a convenient location and the arrangement is such that in one position of the valve 26 the treating liquid travels from the discharge pipe 2'7 to the feed pipe 25 and thence via the manifold 24 to the skein supports, but when in its other position the treating liquid travels from the dis'- charge pipe 27 to the pipe 28, and thence back to `the mixing 'tank 31 from which it is withdrawn by a rotary pump 32. The discharge of the pump s2 is nite the discharge pipe 27 while its inlet side of the-pipe 28. When the supply of liquid is properly mixed and ready for use the valve 26 is thrown to the position which cuts off communication with the pipe 28 and diverts the liquid from Vthe discharge pipe 27 into the feed pipe 25 and thence to the manifold 24. During the dyeing operation the dyeing liquid is maintained at the proper degree of heat for the best results by jacketing the inlet pipe 33 as indicated at -35 and supplying steam or other heating medium to theV jacket by way of a pipe 36 leading from a source of heat and from which jacket it is discharged through a pipe 37. The location of theheating medium above the pipe leading to the pump serves a double function in that it also heats the liquid during its circulation while being mixed ready for use. The pump 32 is fast to a driven shaft 38 which is suitably journalled and receives its motion from a belt driven from a motor 40 of any well known type.

In order that the dye liquid may be properly ltered before being discharged upon the skeins of yarn, a suitable filter or strainer unit 4l is interposed in the length of the feed pipe 25 iny relatively close proximity to the manifold 24 so that the liquid leaving the manifold is clean and free from deleterious particles. I

For regulating and varying the quantity of liquid to be circulated through anysupport tube l0 a valve member 43His mounted upon a threadedv spindle 44 in` coaxial relation" to the tube l0 and the length of the spindle is such that the end of its tube 10U. an'd thusfr'estrict the quantity of entering liquid. 'lhe'spindle '44 isy threaded through the sideoffthe lceiSingfofl the Aheader l1 and terminates in a'isuitaybly shaped vhead 45 for .engagement by' awrench' .or :other implement. -It will thus be `seen 'that by"; rota ting`tlre spindle 44 the position of thev valve '43- with respect to the inlet of the tube"l0 can belvaried'at will and lthe quantity flow from any'tubel thus regulated according to yconditions 'such'as different kinds of yarn. Also one tube can bemade to receive a .maximum ow of liquid by opening the valve 43 entirely, while another tube can have its ow restricted by partially closing the valve 43 and in this way there is a wide flexibility of control. This flexibility is essentially desirable for the selection of the number of treating supports in use at a given time because it makes possible the use of a multiple support machine for treating only enough material as is required to be treated by a single support on the machine. Thus a user of thel machine is not required to purchase a small single machine for use with small batches of material and also purchase a multiple type machine to take care of large batches of material, since by the control of the present invention but one multiple machine need be purchased and this can be transformed at will to conform to the-amount of material to be treated. Also in a multiple machine with al large number of treating supports it is a problem to have each support feed the same quantity of treating liquid through each support, @is of course being due to the fact that some supports are further from the source of liquid supply than the others and were it not for regulation unequal quantities of treating vliquid would be discharged from the several supports and the result would be a wide variation in the finished treatment.

During the treating of skeins by the circulation of the treating liquid it is desirable from time to time to shift the skeins relative to the support in order to bring other portions of the skeins into the directiow of the liquid from the slots 17 and to that end each tube 10 serves as an axis or bearing for the rotation of two hubs 49 and 50 which are spaced by the skein supports 15 and 16 and located in relatively close proximity respectively to the outer faces of the flanges 14. These hubs 49 and 50 respectively carry actuating arms 51 which are fixed thereto and each of which is laterally offset as shown at 52 so thatA the distance between theoiset ends 53 is greater than the distance between the arms 51,/ AAs these ends 53 extend outwardly in parallel. relation, it will be evident that they can be 'swung freely about the tube 10 in two planes which are removed from the end planes of the hanging skeins. In other words provision is made for the free .turning movement ofthe ends 53 without any danger of them/ becoming entangled in the skeins which hang from the fixed A support. These ends 53 are interconnected for simultaneous movement by a bolt 5,4 which terminates at one end in a projecting operating handle 55. Since this bolt 54' lies within'the loop of the skein when the latter is @upon its support it is obvious that movement of the bolt in.

either direction about its axisy of rotation will bring it into contact with one or the other side of the hanging skein and hence the frlctlonal resistance of this fixed bar against the skein thus frays the fine threads and damages the material. In order to overcome this defect of operation a sleeve 56 is mounted for free rotation upon the ,bolt 54 having its ends respectively seated in bearing bushings 57lseating against the sides ofthe end parts 53. The sleeve 56 is concentric with respect to the bolts 54 and'freely rotatable -relative thereto and has its yarn enlgaging face so finished as to practically eliminate friction when contactingv with Vthe skein and whatever friction is developed merely turns the sleeve without exerting any force upon the delicate threads of the material being treated. The normal or inoperative position of the bolt 54 and its parts is directly below the tube 10 where it is entirely out of contact with the skein and so remains until given its rotating movement about the tube 10 as an axis. If it is desired to lock the bolt 54' in this inoperative position it can be done by means of a latch 58 whichis manually controlled by a hand wheel 60 and can move through a part 61 to engage a locking opening 62 at the proper place in one of the arms 51.

As a means for controlling the rotation of the skein lifting sleeves 56 the hub 49 has keyed thereto a-wor1n gear 63 which is in mesh with a 4worm 64 fast to a driven worm shaft 65, which, as here shown, extends across the top of the machine being journalled in bearing 66 and, of

course, having as many worms 64' as there are worm gears 63 so that all of the lift members can be simultaneously rotated. This shaft 65 is arranged to be rotated as required either sporadically or periodically and has keyed thereto a gear 67 which is located within the casing 68 which forms the box for enclosing the rotating and speed control mechanism. The gear 67 is in mesh with a gearV 70 which is keyed to a counter shaft 71 suitably journalled at opposite ends in the walls of the casing 68 and which also carries thereon in keyed but slidable relation a movable element' 72 ofa clutch.' This movable element is provided with a shlft fork 73 which straddles a roller 74 rotatably mounted in a rock arm 75 and counter Iweighted by a weight 76. The rock arm is fast to a stub shaft,

77 which is arranged to be roc ed by a gear 78 which is in mesh with a mov `l e segment rack 80.A The segment is carried by a lever 81 of general bell crank form which is pivoted at182 and has a shortarm 83', this latter journalling a rollerV 84 which rides upon the face of a control cam 85, being held in engagement therewith by a spring 86 stretched to a fixed point 87. The cam is fast to a short shaft 88 which is driven by a spiral gear 90 rin mesh with a driven pinion 91. The pinion 91 is fast to a shaft 92 which receives motion from gear 93 and gear 94 which latter gear is fast to a driving clutch sleeve 95. Both the gear 94 and sleeve [95y are freely rotat- `able upon the counter shaft 71, but receive mothat with the driven cause rotation of the sleeve 95 whereby the gear 94 rotates thegear 93 and brings about rotation of the cam 85. The rotation of this memdvber causes the lever 81 to rock at predetermined intervals so that the rock arm 75 is swung from one position to another4 and according to its direction of movement either throws the movable clutch element 72 into engagement with the sleeve 95 or in the other direction to dis-l engage it therefrom. When this movable element 72 is thrown into engagement with the sleeve 95 the latter transmits motion to the movable element and through it to the shaft 71, gears 70 and 67 to the worm shaft`65 so that the several lift rods or sleeves are caused to rotate about the tubes 10 to lift and change the position of the yarn skeins. Preferably the gearing and the relation oftlr'e associated parts is4 such that the skein lifting rods rotate but once between rest periods.

The means for actuating the driven shaft 98 consists, in the present instance, of a variable speed mechanism so' arranged that at one porltion of the dyeing operation the lift rods will minute to the reels. The selection of one speed A or the other takes place through the medium of a movable clutch element 106 keyed to the shaft 98 and arranged to slide toward and away from the clutch 109 formed` at one side of a sprocket 101. A like movable clutch element 108 is keyed to the opposite end of the shaft 98 and is arranged to slide toward and away from a clutch 110 formed in the face of the sprocket 100 and the arrangement is such that but one clutch member can be engaged with its cooperatfng part at the same time. The actuation of the two movable clutch elements 106 and 108 is brought about through the medium of a U- shaped operating arm 111, the respective ends of which are bifurcated to carry pins 112 which seat respectively in the grooves 113 of the respective clutch elements." The operating'arm 1\50 Cil 111 is pivoted to a fixed part at 114 and has a lateral extension in the form of a handle 115 which can shift'the operating arm at will to cause selection of a different speed of rotation. Normally the clutch element 106 is in engagement to operate the sprocket 101 being so held by the action of a spring 116 which is stretched to a fixed part. Due to the action of the spring the slow speed clutch is normally held in engagement so that the rotation of the yarn lifting arms takes place six times per minute which has been found to be a desirable speed .for the present class of fabric though it is to be understood the invention is not limited to thisparticular speed of rotation and by substitution of other sprockets any 'other desired constant speed can be developed. Whenever during thevcourse of any of the dyeing operation it is desired to increase the speed, the handle 115 is rotated in a proper direction to disconnect the clutch element 106 and engage the clutch element 108 and thereupon there is and inc ease in the rotating speed of the driven shaft 98. As soon as the handle 115 is released ythe spring 116 returns it to its driving relation.

This variation of the speed of rotation of the lifting means which shift the yarn skeins is yan important part of the invention in that it has lon'g been considered an essential operation to periodically change the position of the yarn strands but with relatively long intervals be-r yarn becomes saturated. After saturation it has giving the desired efficient dyeing effectand therefore the present machine is designed so that the speed of rotation of the yarn position changing factors is varied in accordance with the result desired. In some instances it has been found desirable to' change the direction of rota-'- tion of the yarn lifter or even to provide a means whereby they can berotated for a time in one direction and then for a time in the opposite direction, or by proper timing mechanism they can be made to alternate periodically, but as such change of direction can be readily brought about by a reversible motor or a timing mechanism it is not here specifically described, though in the broad sense the appended claims are to be considered as covering any structure vwhich will cause rotation of the lifting members in both directions.

In the form of invention shown.v in Fig. 6 a.

skein support of somewhat different shape from that shown in Fig. 4 is illustrated and consists of a tubular section117 encircling the tube 10 and terminating in twol substantially parallel, upwardly extending side portionsghaving inturned ends 118. These upwardly extending side por.- jtions of the lsection 117 project above the other section 120 of the skein support and this latter in effect becomes an elongeted control member the skein inl effect bridges the space between these ends 117 above the-section 120 so that this bridging portion of the skeins really lies in a chamber of liquid.

In the form of skein support shown in Figs. 12 and 13 the xed support is a tube 122 having two longitudinally disposed rows of outlets 123 for discharging liquid against the contacting portions of the suspended skeins. This tube 122 forms an associated part of the main liquid supply tube 124 (corresponding to part 10 of .the other ilgures) and encircling it in eccentric relation to provide the liquid receiving chamber 125 into which the liquid enters by way of the ports'126.

In order to prevent displacement of the skeins axially of the tube 122, the respective ends of the tube 122 are provided with relatively thick flanges 127 forming guards having inwardly and do'wnwardly curved faces 128. Preferably the circumferential length of these flanges 127 is limited to the upper half portion of the tube 122 where the skeins rest. The curved faces 128 ensure the return of any misplaced skeins to proper supported position upon the tube 122.

For lifting and changing the position of the skeins upon the tube 122 a rod 130 similar to that shown in Figs. 4 and 7 is employed, the same being carried by radial arms 131 from hubs 132 straddling the flanges 127 and tube 122 and arranged to be rotated when. required by the gear 63. Each of the arms 131 terminates in a bearing bushing 133 which seats one end of the rod 130 and carries a curved guide flange 134. In assembled condition the flanges 134 are oppositely-curved to give a converging effect whereby any tendency of the lifted skeins to ride endwise ofthe bar is at once counteracted. It will also be evident that as the two arms I131 travel respectively in planes beyond the ends of the flanges 127 the chance of the skeins becoming entangled with these travelling members is a practical impossibility.

In case it is desired to rotate the skein lifting members manually the` shaft 65 is carried through the gear box and projects at one end where it carries a clutch member 135 which'is keyed thereon and serves to drive the shaft when the clutch member is turned. Movement is imparted to this clutch member by an axially movable clutch part 136 which has a hand operating lever 137 by which .it can be moved into clutching relation and rotated in the desired direction to operate the shaft 65.

It will now be apparent that a complete unitary skein dyeing machine has been devised employing a plurality of skein supports and means for circulating a'treating liquid tosaid supports With a control which varies at will the amount of treating liquid delivered to any particular skein support and wherein the supported skeins of yarn can be lifted in aopredetermined manner and at predetermined intervals to vary the position of the skeins with respect to the supports.` Furthermore provision is made for varying the rotational speed of the skein lifting devices in such a manner that during a single treating operation the lifting devices can be operated at one speed for a certain length of time and then during Aanother portion of the operation at a different speed of rotation. Also provision is made for maintaining the treating liquid in a heated condition such that its delivery to the yarn is maintained at a given Workingtemperature while also provision is made for utilizing this heating. means tol act upon the liquid during 'the preliminary mixing thereof prior to a dyeing operation. It should be noted that the several speed and other controls incorporate in the machine a flexibility not heretofore possible in machines of this character and which is believed to be broadly new.

Generally considered but one 'form of the in. vention has `been here shown by way of .example, but it is to be understood that the invention is not limited to this particular constructionshown, but might be variously modified. Specically considered several forms of skein lifting and control devices are shown, but these also can bevariously changed and reorganized without departing from the present invention.

Having thus described our invention, We claim:

l. A textile processing machine comprising the combination of a support. arranged to-'suspend material to be treated and having liquid discharge outlets therein, a circulating device arranged to deliver a treating liquid to said support, a movable element mounted. to rotate about said support to change the position of said material relative to said support, and a friction reducing means on said element for contacting with said material during the rotation of said element.

2. A textile processing machinecomprising the combination of a support arranged to' suspend material to be treated and having liquid discharge outlets therein, a circulating device arranged to deliver a treating liquid to said support, a movable element mounted to rotate about said support to change the position of said material relative to said support, and a freely rotatable part carried by said element for contacting with said material to eliminate frictional resistance.

3. A textile processing machine comprising the combination of a support arranged to suspend material to be treated and having liquid discharge outlets therein, a circulating device arranged to deliver a treating liquid to said support, flanges at opposite ends of said support for holding said skeins against endwise movement, arms rotatably mounted oh said support and located respectively on the outer sides of said flangesl and having ends offset from'the sides of the two end skeins, and a yarn lifting device carried by said offset ends. l

4. A textile processing machine comprising the combination of,a support arranged to suspend material to be treated and having liquid discharge outlets therein, a circulating device arranged to deliver a treating liquid to said support, flanges at opposite ends of said support for holding said skeins againstendwise movement, arms rotatably mounted on said support and located respectively on. the outer sides of said flanges and having endsA offset from the sides of the two end skeins, a yarn lifting device carried by said offset ends, and a roller freely rotatable v on said lifting device.

5. A textile processing machine comprising Athe combination of a support arranged to suspend material to be treated and having liquid discharge outlets therein, a circulating'device arranged to deliver a treating liquid to said support, a yarn lifting device mounted to rotate about said support to change the position of said material relative to said supportband a variable speed mechanism for rotating said lifting device at different speeds during a dyeing operation.

6. A textile processing machine comprising the combination of a support arranged to suspend material to be treated and having liquid discharge outlets therein, a circulating device arranged to deliver a treating liquid to said support, a yarn lifting device mounted to rotate about said support to change the position of said material relative to said support, means for periodically rotating said lifting device, and'means for varying the periodicity of said rotating means during a dyeing operation.

'7. In a textile processing machine atubular member provided with liquid discharge openings,- a circulating device for delivering treating liquid to said tubular member, a yarn support for holding yarn skeins suspended, said support comprising a section. mounted upon and above said tubular member and a section encircling the body portion of said tubular member and having inwardly turned flanges, said flanges being spaced from said support to provide outlet passages for liquid, the ends of said flanges terminating in spaced relation to the outer face of Isaid tubular member, and means forchanging the position of yarn skeins upon said sectional member.

8. In a textile processing machine, the combination of a yarn support, a tank for a treating liquid, a pump, an inlet pipe from said pump to 'said tank,.a discharge pipe from said pump, and

control means operable at will for connecting said discharge pipe with said tank or with said yarn support whereby in one position of said control means thetreating liquid is .circulated directly through said tank and in another position of said control means the treatingy liquid is discharged upon yarn on said support.

9. In a textile processing machine the combination of a yarn support, a tank for a treating liquid, a pump, an inlet pipe from said pump to said tank, a discharge pipe from said pump, a three Way valve connected tol said discharge pipe,

`a feed pipe from said valve to said yarn support, a circulating pipe from said valve to said tank, and means for shifting said valve at will whereby said liquid is circulated directly through said tank or is discharged to said yarn support.

10. In a textile processing machine, the combination of a yarn support, a tank for a treating liquid, a pump, an inlet pipe from said pump to said tank, means for heating said inlet pipe to maintain liquid therein in a heated condition, a discharge pipe from said pump, a three way valve connected to said discharge pipe, a feed pipe from said valve to said yarn support, a circulating pipe 'from said valve to said tank, and means for shifting said valve at will whereby said liquid is 1l. In a textile processing machine, the combination of a yarn support, a tank for a treating liquid, a pump, an inlet pipe from said pump to said tank, an outlet from said tank, a discharge pipe from said pump, a three way Valve connected to said discharge pipe, a feed pipe from said valve to said yarn support, a circulating pipe from said valve to said outlet, means for shifting said valve at will whereby said liquid is circulated directly through said tank or is discharged to said yarn support, and means to heat said liquid prior to its entry into said valve. 

